C2H5NO2 , if you need the lweis structure let me know.
Answer:
(C) Decomposition reaction
Explanation:
A decomposition reaction is a chemical reaction in which a single compound breaks down into two or more compounds or elements.
<u>in this example </u>
- 2KClO₃(s) ->2KCl (s) + 3O₂ (g)
Potassium chlorate (KClO₃) decomposed to two smaller compounds KCl and O₂ gas.
So, the right choice is (C) Decomposition reaction
Answer:
This solution is called a buffer.
Explanation
It is an aqueous solution containing a weak acid and its conjugate base or a weak base and its conjugate acid. A buffer's pH changes very little when a small amount of strong acid or base is added to it. It is used to prevent any change in the pH of a solution, regardless of solute..
<u>Hope it helps u</u>
<em>Pls mark as brainliest..</em>
Problem 1.
1) Grams to mole, for this we need to know molar mass of a substance.
<span>45.7 grams of calcium chloride
</span>calcium chloride is CaCl2
Molar mass (CaCl2) = 40.1 +2*35.5 = 111.1 g/mol
45.7 gram* 1 mol/111.1 g =(45.7/111.1) mol CaCl2
2) reaction
3CaCl2 +Al2O3 -----> 3CaO +2AlCl3
from reaction 3 mol 2 mol
from the problem 45.7/111.1 mol x mol
We have a proportion, so
x= (45.7/111.1)mol*2/3 mol AlCl3
3) Find mass of (45.7/111.1)*2/3 mol AlCl3
Molar mass (AlCl3) = 27.0 +3*35.5= 133.5 g/ mol
((45.7/111.1)*2/3 )*133.5g/1mol= 36.6 g AlCl3
Problem 2.
This problem can be solved the way like the first one.
But both problems can be solved different way.
Second way to solve these problems.
M(Na)=23.0 g/mol,
M(Na2O)= 2*23.0 +16.0= 62.0 g/mol
4Na + O2 -----> 2Na2O
moles from reaction 4mol 2 mol
masses from reaction 4mol*23.0g/1mol 2mol*62.0 g/mol
92 g 124 g
masses from the problem 25.6 g x g
Now, we can write a proportion:
92 g Na produce 124 g Na2O
25.6 g Na produce x g Na2O
92/25.6 = 124/x
x=25.6*124/92= 35.5 g Na2O
A nucleotide is composed of a phosphate group, sugar, and nitrogen base. DNA is made of 2 strands of nucleotides linked together by covalent bonds between the phosphate and sugar of each nucleotide. The strands of nucleotides are linked together by hydrogen bonds creating DNA. Hope this helps and sorry if I made a mistake.